The woman has not been named by police and she has not come forward to identify herself since the occurrence on Wednesday, just a day after the massacre in Uvalde.
The gunman was Dennis Butler, a 37-year-old criminal who had already been warned for speeding near children when he drove to the graduation party held outside at the Vista View Apartment Complex in Charleston, West Virginia.
He had been told to stop driving so quickly while children were close. He drove away, then came back with an AR-style assault rifle and opened fire.
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The woman was among guests at the outdoor party. When she saw Butler open fire, she immediately pulled out her weapon and shot at him. It's unclear exactly how many people were there but police described it as a "crowd".
Fortunately, no one was injured.
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The woman then pulled her legally-owned gun out of her purse and shot and killed him. At a press conference on Thursday, Charleston Chief of Detectives Tony Hazelett praised the woman as a hero.
"Instead of running from the threat, she engaged with the threat and saved several lives last night," he said.
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And as America debates gun reform in the wake of the Uvalde shooting, pro-2nd amendment advocates are invoking the woman as a hero of their cause.
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"The other side of the gun debate," said one advocate on social media. Others challenged why the story hadn't been brought to the nation's attention.
"A big enough story to make the Saudi Gazette but I found nothing from New York Times, CNN or MSNBC. Yes, media bias is real... on both sides," said another.
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Lawmakers are now meeting intense calls for gun reform following Tuesday's tragedy in Uvalde, where 19 kids and two teachers were killed by a teenage shooter who legally purchased two AR-15 rifles within days of his 18th birthday.
The terrible police response to the shooting meant that injured kids were trapped alone in their classroom with the gunman for an hour after being shot.
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Medical experts now say they may have been saved if the police had reached them sooner.
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Police did not directly rush into the classroom to neutralize the shooter.
There have been various explanations for that. First, cops said it was because they were concerned they would be shot.
On Friday, Texas' top cop said that the officers thought Salvador Ramos had already killed everyone in the classroom and that he had just barricaded himself inside.
The Department of Justice is now examining the circumstances. President Biden and Vice President Kamala Harris are leading calls for AR-15s to be banned.
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